I tried IMR 4064 in the 270 Win, velocites were not that different from what I got with IMR 4350 with 130 grain bullets, which is in the range of 2800 to 2900 fps. When ever I pushed a 130 near 3000 fps groups were horrible. They just got large, something bad was going on. I could never push a 130 in the 270 Win as fast as I could in a 30-06, nor for that fact, could I push a 150 in the 270 Win as fast as I could in the 30-06. At some velocity level, the groups expanded.
For decades I read glowing articles by gun writers who declared the superiority of the 270 Win because you could push a 130 at 3000 fps in the 270 Win. To these characters, 3000 fps was a mystical velocity threshold, like enlightenment, like entering the land of OZ: magic occurred at 3000 fps. Cartridges that pushed bullets less than 3000 fps were beneath contempt. I think they liked 3000 because it starts with the number 3, is a whole number, and triangles have three sides. People have weird relationships with numbers, especially numbers that provide symmetries. I don't know what they would have done with the metric equivalent: 914 meters per second. Maybe they would been excited at bullets that moved 1000 meters per second. Maybe they would have chased a string dragged across the floor, like a cat. Who knows? But whatever fascination these guys had with the number 3, I was unable to get decent accuracy and case life with loads at 3000 fps.
I know others have had good luck with IMR 4064, these are the velocities I got. I finally got frustrated with my load and shot them all up in a 20 round group that was three and a half inches at 100 yards. Yuck. I have proved to my satisfaction that my FN Deluxe is not a target rifle and at best will shoot under two inches.
FN Deluxe 24" Barrel installed new Wolff 22 pound mainspring
130 gr Federal Fusion (pulled) 49.0 grs IMR 4064 wtd lot 2449R Win cases Fed210S OAL 3.225"
8 Feb 2012 T = 50 °F
Ave Vel = 2859
Std Dev = 16
ES = 34
High = 2878
Low = 2844
N = 5
130 gr Federal Fusion (pulled) 49.0 grs IMR 4064 wtd lot 2449R Win cases Fed210S OAL 3.225"
26 Dec 2013 T = 45 °F
Ave Vel = 2831
Std Dev = 26
ES = 63
High = 2865
Low = 2802
N = 5
So-so accuracy
130 gr Nosler 49.0 grs IMR 4064 R 4.6 W/W cases Fed210M OAL 3.25"
13 Aug 2014 T = 84 °F
Ave Vel = 2964
Std Dev = 33
ES = 123
High = 3009
Low = 2886
N = 20
Group size: 3.25" X 3.5"
I had a much better experience with any of the 4350's, either IMR 4350, AA4350 or H 4350. IMR 4831 was the velocity champ, I could push the bullets faster with IMR 4831 than any 4350 or 4064 powder I tried.